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From |
"McDermaid, Cameron" <Cameron.McDermaid@ottawa.ca> |

To |
<statalist@hsphsun2.harvard.edu> |

Subject |
st: RE: RE: RE: Graphing: How to suppress labels on second y axis |

Date |
Thu, 30 Sep 2010 16:35:05 -0400 |

I wasn't clear, Nick. The comments for resetting to one said "for the next loop" but it isn't clear that this meant a different loop. The lev`alert' value is plotted twice against different measures: normalized counts and raw counts. That's why it must be reset to one in order to scale properly for the next measure (the first is a proportion, the second can be any number) and the rationale for storing the value of r(max) within the foreach loop to do so. Another option for the reset to 1 is simply to replace alert`lev'=alert`lev'/alert`lev' and save one line of code. I must admit, I'm still puzzled by my inability to suppress labelling on a second axis. It isn't clear to me from the documentation why this would fail with ylabel(none, axis(2)). Thanks again. > -----Original Message----- > From: owner-statalist@hsphsun2.harvard.edu [mailto:owner- > statalist@hsphsun2.harvard.edu] On Behalf Of Nick Cox > Sent: September 30, 2010 4:21 PM > To: 'statalist@hsphsun2.harvard.edu' > Subject: st: RE: RE: Graphing: How to suppress labels on second y axis > > That's correct. The maximum is put in r(max) after -summarize- but all > r-class results are ephemeral and the next r-class command will > overwrite or obliterate them. So, make all the use you want of r(max) > before it is lost. > > (Since many graphics commands do some computation internally they may > well use an r-class command.) > > The other side of the coin from my previous advice is that if you want > to keep hold of a result you should indeed store it. Your code didn't > show that you wanted to do that. > > That said, it is not clear why you want to repeat exactly the same > calculations. Don't you have the results stored in the variable you > generated? > > If they are not really the same calculations, then it is natural that > the same command might need to be repeated on different data. > > For a start on documentation, see help on -saved results-. > > Nick > n.j.cox@durham.ac.uk > > McDermaid, Cameron > > Having tested this a little more thoroughly, unless I'm doing something > wrong (script below) it appears r(max) isn't maintained in the loop so > is missing when the alert`lev' is to be reset to 1, resulting in a > missing values for the operation. > > The solution is to use the local macro assignment of r(max) as I did > previously or insert sum `lev'normalized, meanonly before > alert`lev'=alert`lev'/r(max) when the alert`lev' is to be reset to 1. > > -cam > > loc levels=" Respiratory Asthma ILI" > foreach lev of loc levels { > sum `lev'count, meanonly > replace alert`lev'= alert`lev'* r(max) > <<GRAPHING ACTIVITY>> > replace alert`lev'=alert`lev'/r(max) > } > > > > -----Original Message----- > > From: owner-statalist@hsphsun2.harvard.edu [mailto:owner- > > statalist@hsphsun2.harvard.edu] On Behalf Of Nick Cox > > Sent: September 30, 2010 1:04 PM > > To: 'statalist@hsphsun2.harvard.edu' > > Subject: st: RE: RE: RE: Graphing: How to suppress labels on second y > > axis > > > > Two small points. It's a smidgen quicker and shorter to write > > > > sum `lev'normalized, meanonly > > replace alert`lev'= alert`lev'* r(max) /*adjusts alert to maximum > value > > in line plot */ > > > > 1. -su, meanonly- despite its name yields the maximum (and some other > > stuff you can ignore). This is discussed at excruciating length in > > > > SJ-7-3 st0135 . . . . . . . . . . . Stata tip 50: Efficient use of > > summarize > > . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . > N. > > J. Cox > > Q3/07 SJ 7(3):438--439 (no > > commands) > > tip on using the meanonly option of summarize to more > > quickly determine the mean and other statistics of a > > large dataset > > > > 2. The business of putting r(max) in a local, and then reading from > the > > local, can be shortened. This has been called "cutting out the middle > > macro". > > > > Nick > > n.j.cox@durham.ac.uk > > > > McDermaid, Cameron > > > > I've made a tweak to Nick's suggestion below. One rationale for using > 2 > > axes was that the primary Y axis is one scale that can vary with the > > data and the second Y axis is fixed from 0 -1 . Using Nick's suggested > > script below uses the alert's actual value (missing, 1) is plotted on > > the primary Y axis and is often out of scale as to be not easily seen, > > depending on the line graph data. > > > > What I've done is adjust the alert value (1) to the maximum value of > the > > data in the line plot then back to 1 once the plot is done. > > > > e.g. > > > > quietly: sum `lev'normalized > > local maxval: display `r(max)' > > replace alert`lev'= alert`lev'*`maxval' /*adjusts alert to maximum > > value in line plot */ > > > > do the plot with || dropline `lev'normalized adm_date if alert`lev'<., > > ms(i) > > > > replace alert`lev'=alert`lev'/`maxval' /*adjusts back to 1 for the > next > > plot loop*/ > > > > This seems to be working. Thanks again to Nick for a kick in the > right > > direction. > > * > * For searches and help try: > * http://www.stata.com/help.cgi?search > * http://www.stata.com/support/statalist/faq > * http://www.ats.ucla.edu/stat/stata/ This e-mail originates from the City of Ottawa e-mail system. Any distribution, use or copying of this e-mail or the information it contains by other than the intended recipient(s) is unauthorized. If you are not the intended recipient, please notify me at the telephone number shown above or by return e-mail and delete this communication and any copy immediately. Thank you. Le présent courriel a été expédié par le système de courriels de la Ville d'Ottawa. Toute distribution, utilisation ou reproduction du courriel ou des renseignements qui s'y trouvent par une personne autre que son destinataire prévu est interdite. Si vous avez reçu le message par erreur, veuillez m'en aviser par téléphone (au numéro précité) ou par courriel, puis supprimer sans délai la version originale de la communication ainsi que toutes ses copies. Je vous remercie de votre collaboration. * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

**References**:**st: Graphing: How to suppress labels on second y axis***From:*"McDermaid, Cameron" <Cameron.McDermaid@ottawa.ca>

**st: RE: Graphing: How to suppress labels on second y axis***From:*Nick Cox <n.j.cox@durham.ac.uk>

**st: RE: RE: Graphing: How to suppress labels on second y axis***From:*Nick Cox <n.j.cox@durham.ac.uk>

**st: RE: Graphing: How to suppress labels on second y axis***From:*"McDermaid, Cameron" <Cameron.McDermaid@ottawa.ca>

**st: RE: RE: Graphing: How to suppress labels on second y axis***From:*"McDermaid, Cameron" <Cameron.McDermaid@ottawa.ca>

**st: RE: RE: RE: Graphing: How to suppress labels on second y axis***From:*Nick Cox <n.j.cox@durham.ac.uk>

**st: RE: Graphing: How to suppress labels on second y axis***From:*"McDermaid, Cameron" <Cameron.McDermaid@ottawa.ca>

**st: RE: RE: Graphing: How to suppress labels on second y axis***From:*Nick Cox <n.j.cox@durham.ac.uk>

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